The Logitech M510 Wireless Computer Mouse is a comfortable, ergonomically sculpted mouse that is easy to take with you. This mouse has a USB receiver that can be stored inside the mouse or in the included carrying case. The mouse also has a dark gray color with soft rubber grips. This mouse is great for use with a laptop or desktop computer. The ergonomic design and soft rubber grips make it comfortable to use for long periods of time. The compact size also makes it easy to take with you when you travel. The Logitech M510 Wireless Computer Mouse is a great choice for anyone who wants a comfortable, ergonomic mouse that is easy to take with them.